:root {
  --navy: #102a43;
  --navy-2: #243b53;
  --accent: #0e7490;
  --ink: #1c1917;
  --muted: #5c5a57;
  --line: #d7d2cb;
  --bg: #f4f1ea;
  --paper: #fffcf7;
  --max: 68rem;
}

* { box-sizing: border-box; }
html { color-scheme: light; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Source Serif 4", "Iowan Old Style", Palatino, Georgia, serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}

a { color: var(--accent); }
a:hover { color: var(--navy); }

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus { left: 1rem; top: 1rem; background: #fff; padding: 0.4rem 0.6rem; }

.topbar {
  background: var(--navy);
  color: #e8eef2;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}
.topbar .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0;
}

header.site {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.wrap {
  width: min(100% - 2.4rem, var(--max));
  margin: 0 auto;
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem 0 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  text-decoration: none;
  color: var(--navy);
}

.mark {
  width: 2.6rem;
  height: 2.6rem;
  border: 2px solid var(--navy);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.brand h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand p {
  margin: 0.1rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

nav.primary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  font-size: 0.95rem;
}
nav.primary a {
  color: var(--navy-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
nav.primary a:hover,
nav.primary a[aria-current="page"] {
  border-bottom-color: var(--accent);
}

.hero {
  padding: 3rem 0 2.6rem;
  background:
    linear-gradient(180deg, #fff 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}

.hero h2 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  line-height: 1.25;
  color: var(--navy);
  max-width: 40rem;
}

.lede {
  max-width: 40rem;
  color: var(--muted);
  margin: 0 0 1.4rem;
  font-size: 1.05rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  text-decoration: none;
  border: 1px solid var(--navy);
  color: #fff;
  background: var(--navy);
}
.btn.ghost {
  background: transparent;
  color: var(--navy);
}

main { padding: 2.4rem 0 3.5rem; }

h2.section {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  color: var(--navy);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1rem;
}

.card, .journal, article.policy, .notice {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 1.15rem 1.2rem;
}

.card h3, .journal h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  color: var(--navy);
}

.kicker {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.35rem;
}

.meta { color: var(--muted); font-size: 0.92rem; margin: 0.25rem 0; }

.notice {
  border-left: 3px solid var(--accent);
  margin: 0 0 1.5rem;
}

.preprint-banner {
  background: #fff6d8;
  border: 1px solid #e2c36b;
  color: #5c4810;
  padding: 0.85rem 1rem;
  margin: 0 0 1.25rem;
}
.preprint-banner strong { color: #3f320c; }

.abstract {
  background: var(--paper);
  border-left: 3px solid var(--accent);
  padding: 0.9rem 1rem;
  margin: 1.25rem 0 0;
}
.abstract h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}
h1.citation_title {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.3;
  color: var(--navy);
  margin: 0 0 0.6rem;
}
.citation_author { font-size: 1.05rem; margin: 0 0 0.4rem; }
ol.refs, main ol { padding-left: 1.25rem; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.65rem 0.7rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--navy); font-weight: 650; }

footer.site {
  background: var(--navy);
  color: #c5d0d8;
  padding: 1.6rem 0 2rem;
  font-size: 0.88rem;
}
footer.site a { color: #d7ecf2; }
footer.site .wrap {
  display: grid;
  gap: 0.7rem;
}
.fine {
  color: #9fb0bb;
  font-size: 0.8rem;
}

form {
  display: grid;
  gap: 0.7rem;
  max-width: 32rem;
}
label { font-size: 0.92rem; color: var(--navy-2); }
input, textarea {
  font: inherit;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--line);
  background: #fff;
}
button[type="submit"] {
  font: inherit;
  padding: 0.55rem 1rem;
  border: 0;
  background: var(--navy);
  color: #fff;
  width: fit-content;
  cursor: pointer;
}

@media (max-width: 640px) {
  .hero { padding: 2rem 0 1.8rem; }
}